Sir Alex Ferguson reignited his feud with Arsene Wenger last night by claiming Arsenal receive special treatment from the FA - following their decision not to charge William Gallas.

Manchester United touched down in Lyon ahead of tonight's Champions League tie against France's No.1 side, but Fergie's mind was still on the injustice he witnessed at Old Trafford during Saturday's 4-0 FA Cup rout of Arsenal.

Fergie was incensed the FA decided to take no action against Arsenal captain Gallas, despite TV replays showing he deliberately kicked Nani off the ball - and accused the FA of favouritism towards Wenger and his players.

"What I will say is that there's one law for Arsenal and another for everyone else," said Fergie. "Or a different rule.

"There could have been quite a few players sent off from their team.

"I didn't realise that until I saw a video of the game afterwards. Justin Hoyte had a kick at Nani off the ball and their young left-back Armand Traore had a terrible tackle on Nani as well.

"There will be a lot of clubs disappointed no action was taken against Gallas, because they've suffered from a retrospective view of certain incidents involving their own players.

"But it was a tough game for the ref Alan Wiley, and I think in the second half he'd probably had enough and just wanted to get to the end of the game.

"The important thing from our point of view is that we made everyone aware of the incident involving Gallas and Nani."

Fergie has immense respect for Lyon and recalls Ryan Giggs, Paul Scholes, Cristiano Ronaldo and Owen Hargreaves in place of the understudies who sparkled against Arsenal.

Giggs will become only the eighth player to play 100 Champions League matches - and Fergie paid special tribute to the winger, who is just 14 games short of equalling Sir Bobby Charlton's record 759 United appearances.

"It would be fantastic for Ryan to get the record in the Champions League Final," said Fergie. "He has been a model professional and even though he's 34, we still expect big things of him.

"The Champions League represents the biggest challenge in football.

"Ryan has always reserved his best performances for the big occasions. For him to reach 100 Champions League games is a fine achievement."